On Thu, Jul 21, 2016 at 02:03:38PM +0300, Ilya Maximets wrote:
> From: Sergey Dyasly <s.dyasly at samsung.com>
>
> Rx loop inside _recv_raw_pkts_vec() ignores nb_pkts argument and always
> tries to receive RTE_I40E_VPMD_RX_BURST (32) packets. This is a violation
> of rte_eth_rx_burst() API and can lead to memory corruption (out-of-bounds
> writes to struct rte_mbuf **rx_pkts) if nb_pkts is less than 32.
>
> Fix this by actually using nb_pkts inside the loop.
>
> Fixes: 9ed94e5bb04e ("i40e: add vector Rx")
>
> Signed-off-by: Sergey Dyasly <s.dyasly at samsung.com>
> Acked-by: Ilya Maximets <i.maximets at samsung.com>
> ---
> drivers/net/i40e/i40e_rxtx_vec.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/i40e/i40e_rxtx_vec.c
> b/drivers/net/i40e/i40e_rxtx_vec.c
> index 05cb415..51fb282 100644
> --- a/drivers/net/i40e/i40e_rxtx_vec.c
> +++ b/drivers/net/i40e/i40e_rxtx_vec.c
> @@ -269,7 +269,7 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct
> rte_mbuf **rx_pkts,
> * D. fill info. from desc to mbuf
> */
>
> - for (pos = 0, nb_pkts_recd = 0; pos < RTE_I40E_VPMD_RX_BURST;
> + for (pos = 0, nb_pkts_recd = 0; pos < nb_pkts;
> pos += RTE_I40E_DESCS_PER_LOOP,
> rxdp += RTE_I40E_DESCS_PER_LOOP) {
> __m128i descs[RTE_I40E_DESCS_PER_LOOP];
> --
> 2.7.4
Acked-by: Adam Bynes <adambynes at outlook.com>
